Reported UPI Fraud Case

He called me saying from flipkart delivery, we are unable to deliver your order, so please pay exact amount which you've paid already. We'll resend your amount within 2minutes. So I thought it's real and paid the amount again. He then blocked me. While I opened flipkart, there's no update and customer care told me that we won't ask you to pay money again. It may be fraud bbe careful next time.